* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #f5f7fa;
    color: #333;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    flex: 1;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

.header {
    background-color: #165DFF;
    color: white;
    padding: 16px 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.footer {
    text-align: center;
    padding: 20px;
    color: #666;
    font-size: 14px;
    border-top: 1px solid #e5e7eb;
    margin-top: auto;
}

.card {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
    padding: 24px;
    margin-bottom: 20px;
    transition: all 0.3s ease;
}

.card:hover {
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}

.btn-group {
    display: flex;
    gap: 12px;
    margin-top: 16px;
}

.preview-container {
    margin-top: 20px;
    border: 1px solid #e5e7eb;
    border-radius: 6px;
    padding: 16px;
    max-height: 300px;
    overflow-y: auto;
    background-color: #fafafa;
}

.file-info {
    margin-top: 16px;
    padding: 12px;
    background-color: #f5f7fa;
    border-radius: 6px;
    font-size: 14px;
}

.processing-indicator {
    text-align: center;
    padding: 40px 0;
}

.el-upload {
    width: 100%;
}

.el-upload-dragger {
    width: 100%;
    height: 200px;
}